Oscars grow larger than 12 inches in size and are a messy fish. It would survive for a while but would get many complications once it grow to a good size and ultimately would either die or need a new and bigger home.
depends on the species you want to keep... 20 - 50 fishes are good in tank of this capacity
it depens on the fish... lol
depends on the size of the fish, and the length/width of your tank.. the maximum inches of total fish you can get for a 29 (110 liter) tank is usually 20 inches fish. absolute maximum is 29 inches. hope this helps.
yes
71 liters is almost 19 gallons and the rule with tropical fish is one inch of fish per a gallon of water at there adult size so it would be different for every fish you got like if the fish adult size is 2 inches that you could have about 10 of that fish in your tank.
25
You can but it is not healthy fro your fish and increases the chance of disease and can shorten there life span. It can also make your water cloudy very rapidly which is also likely to kill your fish if kept in over time. A good rule is 1-2 inches of fish per gallon or 1 cm of fish per liter. Be sure to keep in mind that the fish will grow.
IN WATER!!!! (TANK!!)
it cleans the tank and keep the fish heathy
There are a variety of fish that can keep a tank clean. The type of fish will depend on the type of aquarium setup. In a freshwater tank, different types of plecostomus are most common.
Not unless you had another fish in there.
fish tank